Laser-engraving blank size: length: 1.96 inches (50mm); Width: 1.18 inches (30mm); Thickness: 0.039 inch (1mm); Number of holes: 1, hole diameter: 0.11 inch (3mm). Necklace size: 2.4 mm diameter ball, chain length 24 inches. Features: These Laser-engraving blanks are made of aluminum, light weight, not easy to rust or fade, and can be stamped, stamped and engraved. They are without sharp edges. The necklace will not rust because it is made of stainless steel. The chain is long enough to wear. Wide application: blank pet tags can be used as ID tags for pets, such as and cats, as well as decorative accessories for key chains and bags; The name, telephone number and address can be engraved on it. Material: Aluminum colour: Black Package Contents: 25 x blank shielded aluminum Laser-engraved label (50 x 29mm) 25 x necklace (60cm) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.